Machine for rubbing, grinding, or reducing materials.



. S. LEEAM. MACHINE FOR RUBBING, GRINDIG, OR RBDUGING MATERIALS.

` APPLICATION FILED 116.111, 1912.

1 ,057,747. Patented Apr. 1,1913.

2 SHEETS-SHEET 1.

S. LEBTHAM. MAGHINE FOB. EUBBING, GRINDING, 0R REDUGING MATERIALS. APPLIUATION FILED AUG. 16, 1912.

1,057,747'. l JPatented Apr. 1, 19B.

2 SHEETS-SHEET 2. E d,

y f/L' e M d 6 A f' f y fm g STATES PATENT oFFroE.

SIDNEY ILEETiiAM, or YORK, -ENGLA-nn- Specification of Letters Patent;

Patented Apr.

, Application filed August 16, 1912. Serial No. 715,452.' v

To all whom, 'it mag/ concern Be itvknown that I, SIDNEY Lam-11AM. a subject of the vKing of Great Britain, resid. ing at Elm Bank, York, England, have invented new and useful Improvements in Machines for Rubbing, Grinding, or Reducing Materials, of which the following is aA specification. f

My invention relates to machines chiefly designed for subjecting grain to a rubbing action under ypressure for' the *purpose of removing -dirt or other impurities from the surface' thereof, or for subjecting materials,

` such as middlings and other products 'of the milling process to a further grinding or -triturating action, but also applicable for grinding cocoa, spices and other materials,

Y and-to that classof machine forming4 the subject of British Letters Patent granted to mella-11487 799, whereinthe material to be treated is fed-by a worm or conveyerto- -ward an outlet adapted'to be more or less restricted according to the degree of pres-4 sure required; the object of my invention being to provide a more elficientinachine of this class.

According to 'iny invention vthe inaterialin its passagethrough the machine under the f action of the conveyer is split up into -a seriesof layers,- which will be 'caused to ro,- tate with relation to 'one another, whereby '-a. most t orough rubbing or grinding action tion of the-discharge.

In *a 'suitable arrangement for carrying' be roduced according. to the-restric- 'cut-my' invention I fix upon the 'shaft of the conveyer but between the' latter and the 'discharge outlet a series of blades or-disks with apertures formed inthem,'an'd adjacent to, and between these blades or disks, I

arrange stops which may be either fixed or Y movable and which serve vto prevent the material, which 'is' being moved in a rotary direction by'the conveyer, from rotating, or

to rotate in the reverse direction, so that a rubbing action may f b set up between the layer's'of material between, such stops andl thelayers of material in the recesses of the adjacent moving bladesor disks.

theaccompanyingdrawings, Figure l is a sectional side view of a. machine of the kind referred to in my former specification,

lhaving my present improvements appliedv to-it; Fig. 2 is av plan ofthe same. Figs; '3, 4 and-5 are sections on the-lines 33,4'-j4,1

and 5 -5, respectively of 1. Fig. 6 is a' transverse section illustrating a modification, and Fig.- 7 is a sectional 'side View thereof. Fig. 8 is a transverse section illustrat-ing a further modification, and Fig. 9 is a plan with the upper part of the casing removed. Fig. 10 is asectional view illustrating amodifcation of my invention, wherein the stops rotate in a reverse direction to the disks, and Fig, 41l is a section on 'the line 11-11, Fig. 6. l l

a indicates the body or grinding chamber of the machine having the vhopper b, and c indicates the .wo'rm or conveyer which' is 'mounted on the shaft d and carries the drivf ing pulley e.

According to the present invention the.

. so as to carry a series of disks f, f1, f?, which rotate with the worm.

g, g1, .g2 are circumferential rows of stops .whi'charev inserted through the body -and project vinto thecasing in front of the disks ff, between the disks f and f1., and between are placed-so that they are not in rubbing contact with the disks. The several'disks f, f1, f2 have portions'cut away, for instance, as shown in Figs. 3 to 5, the disks f, fzhaving portionscut away toform recesses k, la?

the disks f1 and f'"A respectively. These stops respectively, while the disk f1, shown in Fig.

4 'has the side cesses h1.-

With the described construction it will portions cut away to form ref be understood, that the material delivered A into the grinding chamber a through the hopper Z) will` be fed forward in the well ln'iown manner, rotating with vthe conveyer;

as the material, howeverpasses between the first row of studs g, this rotary motion will be arrested so that a rubbing action will take place between thev disk'fandthe ma- 4terial between the studs. g. As the pressure .of the conveyer continues thematerial will be forced into the recesses b in the disk f, and

loo

thence into'the space between the disks f, 1 4

where-the rotary motion will be again -ar rested by the studs g1; the materialwill then,`

travel through the recesses h1 'of the disk into the space between the disks f1., .f2 where again the rotary motion will'be arrestedanda further grinding set up, thel material finally escaping througl'i'q recesses k2 tothe discharge en'd of: the chamber al.y

` In practice it -will be understood thatthe:

several disks will be arranged nsuch rela- `passed the several disks it may be subjected to still further pressure by the action of the conical end piece i described in .my former specification. Instead of this end piece 'i' any other means for restricting `the outlet may be employed; for instance a series of disks, sufliciently numerous to produce the desired pressure may be employed Without using any other means for restricting the outlet, provided the recesses in the several disks are arranged in such relation to one another that at no time is a series of recesses in alinenient.

In the case of a machine intended for rubbing grain under pressure the stops must be arranged at such distance from the disks as to avoid the liability of the grains being broken. Instead of employing stops such as g as described, any other device suitable for arresting the rotary movement of the lmaterial may be employed, for instance a series of transverse bars, such as g3 Figs. 6 and 7 may be employed. Or instead of these bars g3 fixed gratings g* Figs. 8 and 9 with apertures g5 of any suitable shape may beemployed, the casing a and the gratings being made in halves as shown to alloaT of such gratings being placed in position. lnstead of fixing the stops or the equivalent With relation to the casing a., they may be movable with relation thereto, for instance, as shown in Figs, 4l0 and ll, wherein the several series of stops g, g1, g2 are repre sented as being in the form of blades attached to a Wheel or drum 7a rotating on the casing'a, this drum l@ being adapted to oe rotated in a reverse direction to that of the disks f, f1, f2.

The stops g, g1, g2, Figs. l to may be made so that the extent to which they pro ject into the grinding chamber may be va ried; also in the arrangement shown in Figs. 10 andlll the stops may be in the form of screw studs and may be made adjustable as previously mentioned Although have described my invention as applied to a machine in which a series of mutilated disks are fixed to the conveyer shaft, it is to be understood that blades arranged at rightangles to the shaft can be arranged to Work between the stops or other blades similar to conveyer blades, but acting in the reverse direction to such blades, can be employed, the essential feature of my iii-- vention consisting in the arrangeinent.k in

combination with a conveyer and a. series of blades Which tend to check the forward movement of the material under the action of the conveyor, of means for checking the rotary movement of the material so as to set up a rubbing action.'

Claims.

l. ln a machine of the kind hereinbefoie referred to,l the combination with a spiral conveyer adapted to move the material to Ward a discharge outlet, of a series of disks mounted upon the conveyer shaft between the conveyer and the discharge outlet,said disks tending to 'resistt'the forward movement of the material ander the action of the conveyer, the said disks being provided with recesses for receiving the material, and of means adjustable toward and from the conveyer shaftfor checking the rotation of the material adjacent to the said disks, whereby the layers of material carried by the disks will be rubbed against the stationary layers of material on either side of the latter.

ln a machine of the class described, the combination with a spiral conveyer adapted to move the material toward a discharge outlet, of a series of disks mounted upon the conveyor shaft between the conveyor and the discharge outlet, said disks tending to resist the forward movement of the material under the action of the conveyor, the said ers of material carried by the disks will be* rubbed against the stationary layers of ma terial on either side of the latter.

3. In a machine of the kind hereinbefoi'e referred to, the combination with a spiral conveyer adapted to move the material to- Ward a discharge outlet, of a series of disks mounted upon the conveyer shaft between the conveyer and the discharge outlet, said disks tending to resist the forward movement of the material under the action of the conveyer, the said' disks being provided 'with recesses for receiving the material, the recesses in one disk being oppositely disposed to the closed portions of adjacent disks, and of adjustable means for checking the rotation of the material adjacent to the said disks, whereby the layers of material carried by the disks will be rubbed against the stationary layers of material on either side of the latter.

SBNEY LEETHAM.

Witnesses:

Jol-in E. BoUsrmLn, C. G. Bananen. 

